Pulverizer



Sept. .23, 1930.

C. A. DREISBACH PULVERIZER Filed Feb. 27. 1928 4' Sheets-Sheet 1 p 2-3, 1930- I c. A. DREISBACH 1,776,654

PULVERI Z ER Filed Feb. 27, 1928 4 Sheets-Sheet 2 a 4 MXW Sept. v23, 1930. c. A. DREISBACH PULVERI Z ER Filed Feb. 27, 1928 4 Sheets-Sheet. 4

Patented Sept. 23, 1930 UNITED STATES PATENT OFFICE CHARLES A. DREISBACH, OF NEW HAVEN, CONNECTICUT, ASSIGNOR TO THE STANDARD EQUIPMENT CO. INC., OF NEW HAVEN, CONNECTICUT, A CORPORATION PULVEBIZER Application filed February 27, 1928. Serial No. 257,286.

This invention relates to an improvement in pulverizers of the type designed to crush slag cinders so as to separate the metal therefrom.

One of ;the objects of this invention is to provide means for supporting the upper crushing-roll independent of the end closure plates of the barrel, so that inspection, repair and replacement of the parts Within the barrel is greatly facilitated.

With this and other objects in view, my invention consists in a pulverizer having certain details of construction and combinations of parts as will be hereinafter described and particularly recited in the claims.

In the accompanying drawings: Fig. 1 is an end view of a pulverizer constructed in accordance with my invention;

Fig. 2 is a vertical transverse sectional view thereof; v Fig. 3 is a detail sectional view on the line 3-3 of Fig. 2; Fig.4 is adetached faceview of the revolving drum; Fig. 5 is an enlarged-scale sectional view on the line 5-5 of Fig. 4;

Fig. 6 is a similar view on the line 6 -6 of Fig. 1; e

7 is atop or plan view of the bridge member, together withthe bracket-arms and yoke designed-"to mount the upper'crushingroll; i

Fig. 8' is a view thereof in side elevation; and V i Fig. 9 is a view thereof in end elevation. In the pulverizer herein chosen for the illustration of my invention, I employ a rer r i Secured volving drum 10, comprising a palr of circular end-plates 11 and 12 spaced apart and having their peripheries connected by segmental plates 13 secured thereto. The enclplates 11 and 12 just described are respectively formedfwith circular axial openings '14 and 15 around which sloping inwardlyprojectingannular guard-flanges, 16 and 17 are respectively formed integral with said end-plates.

to the outerface of .the end-plate 11 by means of bolts 18 is a concentric annulartrack-ring 19, slightly larger in diameter than the opening 14 in the said end-plate and resting upon two idler rolls 20-20 mounted in adjustable channels 21 supportedupon a frame standard 22. The said track-ring is formed internally with an annular series of gear-teeth 23, by means ofwhich the drum 10 is driven, as will hereinafter appear.

Similarly, the end-plate 12 has secured to its outer face, by means of bolts 2 1, a concentric annular track-ring 25, resting upon idler-rolls 26 (only one of which is shown) corresponding to the rolls 20 and carried by a frame standard 27 complementing the frame standard 22 and connected thereto at its lower end by tie-rods 28.

Extending through the openings 14; and 15 of the drum 10 from side to side thereof and resting at its respective opposite ends upon the frame standards 22 and 27 before mentioned, is a bridge-member 29, upon which is mounted bearings 30, 31 and 32 in which the shaft 33 of the center crushingupper or idler crushing-roll 37 rotating upon a two-part bushing 38 mounted upon a shaft 38 having polygonal opposite ends fitting into slots 39 formed in the free ends of the respective arms 40-40 of a swinging yoke 41.

To permit the upper crushing-roll 37 to rise and fall with respect to the center crushing-roll 3 1, as is required in the crushing operation, the yoke 11 above described is mounted so as to swing in the vertical plane by means of ashaft 12 passing through its tubular cross-reach 4:3 and through the respective upper ends of a pair of inclined bracketarms 4H4 upstanding within the drum from thebridgemember 29 and secured ment shaped plates 46 and 47 spaced apart a distance substantially corresponding .to the distance between the said end-plates. Respectively complementing the said plates 46 and 47 just mentioned, so as to close the upper portions of the openings 14 and 15, I employ two closure plates 48 and 49 bolted to the upper face of the bridge-member 29, as indicated in Fig. 2.

For the purpose of revolving the drum 10, the internal gear-teeth 23 of the track-ring 19 which is secured to its end-plate 11 are meshed into by a spur-gear 50 secured to a short shaft 51 carried by a bracket 52 offsetting from the bridge-member 29 and also having secured to it a sprocket-wheel 53. The said sprocket-wheelie connected by means of a sprocket-chain 54 to a sprocket-wheel 55 secured to the shaft 33 of the center crushing-roll 34.

The outer end of the center crushing-roll shaft 38 has keyed to its outer end a large spur-gear 56 meshing into a spur pinion 5'7 secured to a drive-shaft 58 supported in bearings 5959 secured to the frame standard 22.

The outer end of the said driveshaft mounts tight and loose pulleys 60 and 61 respectively, of usual form and adapted to receive a drivebelt (not shown) extending to any suitable source of power.

As thus constructed, the drum 10 of my improved pulverizer is mounted for'rotation above a water-trough 62 by means of the track-rings 19 and 25, which, as above described, rest upon the idler-rolls 20 and 26. This rotation of the drum is designed to cause transverse lifting-vanes 63 therein to repeatedly lift the slag cinders with which the drum is charged and to deposit the same upon the center crushingroll 34, where they are subjected to the grinding action of the teeth and 86 of the respective crushingrolls and 37 in the usual manner of pulverizers of the class to which my invention relates.

The crushing action just above mentioned .erves to crush the cinder into powder and separate the metal content therefromf -The cinder powder, as fast as it is formed, is

' carried out of the drum by the water therein,

which flows outward through an overflowopening 64 formed in the segmental plate 47, through the track-ring 25, thence into a settling-tank 65 of usual and well-known form and ultimately into the trough 62 via a duct 66, after depositing its load of cinder powder in the settling-tank. 7

For the purpose of continuously-introducing water into the revolving drum 10 from the trough 62, in which the same revolves, the end-plate 11 is formed, near its periphery, with an annular chamber, which is divided by partition walls 67 into six corre sponding segmental channels 68. At its forward end, each of the said channels is provided with an inlet-port 69 leading outward through'the outer face of the end-plate 11,

where it is covered by a perforated screenplate 70. At its opposite end, each of the said channels 68 is also formed with an outlet-port 71 which registers with the outer end of a tangential duct 72 formed between the outer face of the end-plate 11 and a box-like casting 73 secured thereto by bolts 74. The inner end of the duct 72 registers with a discharge-port 75 passing through the said endplate and into the interior of the drum adjacent the opening 14.

As the drum revolves in the trough 62, water will flow through the perforated screen-plates 70, through the inlet-ports 69 which they cover, through the curved channels 68, outward through the ports 71, through the ducts 72 and discharge-ports 7 5, into the interior of the drum at a point considerably above the level of the metallic sediment therein, so that the same is not only prevented from clogging the various ports and channels through whichthe water is in troduced into the drum, but its escape outward into the trough 62 is effectively prevented.

If it should become necessary for any reason to inspect, repair or replace the crushingrolls or other parts within the drum under ordinary circumstances, it is only necessary to remove the closure plates 48 and 49, which may be done without disturbing the mountings of either the center roll 34 or the upper roll 37.

I claim:

1. In a pulverizing apparatus, the combination with a rotary drum having an axial opening in each of its side walls; of normally-stationary removable closure-plates for the said openings; means for rotating the said drum; two frame-standards positioned exterior to the said drum on the respective opposite side thereof; a bridge-member independent of the said removable closure-plates and extending from side to side through the axial openings in the said drum and supported at its respective opposite ends by the said frame-standards; a main crushing-rolhan upper crushing-roll .7 and means laterally offsetting within the drum from the said bridge-member for mounting the said upper roll with freedom for vertical movement; whereby the said upper roll is supported independent of the removable closure-plates, which latter may be displaced without disturbing the support of the said upper roll. r

2. In a pulverizing apparatus, the combination with a rotarydrum having an axial opening in each of its side walls; of normally-stationary removable closure-plates for the said openings; means for rotating the said drum; two frame-standards positioned exterior to the said drum on the respective opposite sides thereof; and carrying bearings for supporting a main crushing-roll; a bridgemember independent of thesaid removable closure-plates and extending from side to side through the axial openings in the said drum and supported at its respective opposite ends by the said frame-standards; a main crushing-roll supported in the aforesaid bearings carried by the tWo frame-standards; an upper crushing-roll; and means laterally offsetting Within the drum from the said bridgemember for mounting the said upper roll With freedom for vertical movement; whereby the said upper roll is'supported independent of i the removable closure-plates Which latter may be displaced Without disturbing the support of either crushing-roll.

3. In a pulverizing apparatus, the combination ith a rotary drum having an axial opening in each of itsside Walls; of normally-stationary closure-plates for the said openings; means for rotating the said drum; two framestandards positioned exterior to the said drum on the respective opposite sides thereof; a bridge-member independent of the said removable closure-plates and extending from side to side through the axial openings in the said drum and supported at its respective opposite ends by the said frame-standards; a main crushing-roll; an upper crushing-roll; a pair of bracket-arms laterally-offsetting Within the drum from the said bridge-member; and ayoke pivotally connectedto theouter ends of the said bracket-arms and embracing the said upper roll to support the same with freedom for vertical movement; whereby the said upper roll is supported independent of the removable closure-plates Which latter may be displaced Without disturbing the support of either crushing roll.

4. In a pulverizing apparatus, the combination'with a rotary drum having an axial opening in each of its side Walls; of segmentshaped stationary removable closure-plates adapted to partially close the upper portion of thesaid axial openings; means for rotating the said drum; two frame-standards positioned exterior to the said drum on the respective opposite sides thereof ;a bridgemember independent ofthe said removable closure-plates and extending from side to side through axial openings in the said drum between the said fra1ne-standards and formed with segment-shaped depending closureplates adapted to close the lower portions of the said axial. openings a main crushing-roll;

an upper crushing-roll; and means laterally offsetting Within the said drum from the said bridgemember for mounting the said upper roll With freedom for vertical movement; whereby the said upper roll is supported independent of the removable closure-plates which latter may be displaced Without disturbing the support of the upper roll.

In testimony whereof, I'have signed this specification.

CHARLES A. DREISBACH. 

